Refrigerated insulation



TTORNEY Mid? [N ENTOR UOSEPHII'XROSS Filed April 20, 1936 Dec. 6, 1938.

Patented Dec. 6, 1938 I UNITED STATES PATENT OFFICE REFRIGERATED INSULATION Joseph M. Ross, Bell-aire, N. Y. Application April 20, 1936, Serial No. 75,371

4 Claims. (01. 6287) This invention may be designated as refrigerl1, and finally there is provided an outer shell or ated insulation and relates to means for efificasing l8.

ciently maintaining a refrigerated area, such as In the space between the shell '9 and the vaca food chamber and the like, within a desired uum flask l3, there is placed a refrigerant such temperature range. as the cracked ice IS. The whole assembly as 5 More specifically the invention deals with reabove described may be provided with a lid cover frigerator insulation which I designate as resuch as shown at 20. frigerated insulation since it is contemplated The shells 6 and 9 are preferably made of to actually provide an insulation which, in part, metal while the shell l8 and flask l3, although 10 comprises a refrigerant. preferably made of metal, may be made of other 10 The major object of the invention, therefore, suitable materials such as wood, glass, or a phe is to provide arefrigerator insulation which innolic condensation product. cludes a refrigerant. In use, the refrigerator shown in Figure 1, is Another object is to provide a refrigerated infilled with the refrigerant l9 which chills the sulation which comprises a combination of heat shell 9. This shell transmits its low temperature 15 insulating means and a refrigerant. to the shell 6 by means of direct conduction A further object is to provide a refrigerated between the bottoms H and 8, and the chilling insulation which comprises a combination of heat of the dead air in the chamber l2, the low teminsulating means and a refrigerant, the heat inperature of which is conducted to the walls I.

sulating means comprising either a combination In this manner, the chamber 5 is provided with 20 of vacuum and solid or granular insulation, or, a refrigerating temperature.

a combination of vacuum, dead air, and solid or The melting rate of the refrigerant i9 is maingranular insulation. tained relatively low by the effective insulation The invention, as hereinafter described and as formed by the vacuum flask l3 and the insulashown in the accompanying drawing in several tion [1. This melting rate is further reduced be- 5 of its embodiments, may be employed in many cause of the slow heat exchange between the reways. The particular combinations of insulation frigerant I9 and the chamber 5 since the only and refrigerants being shown rather as exemdirect communication between them is at the botplary than limiting. toms 8 and H. e

In the drawing: Because of the direct contact between the bot- 30 Fig. 1 is a partial elevational, partial sectional tom walls 8 and II, the bottom of the food chamview of a. refrigerator incorporating features of her, being most adjacent these walls, is at the the invention. lowest temperature of said food chamber and Fig. 2 is a similar view of another form of resince most of the cold is being supplied from befrigerator showing an alternate form of refrig- Hea h, there is thus caused a minimum of air 5 erated insulation. circulation in the food chamber. The phenome- Fig. 3 is a fragmentary detail sectional i non is directly opposite to that which occurs in of still another form of refrigerated insulation. the Ordinary type of refrigerator, since these ew particular referen e to Figure 1, the pend on circulation of the air in the food chamber chamber 5 for the storage of food, liquids and for whatever emcienfzy they may have- 40 the like, is formed, as shown, as a rectangular The temperature m the chamber 5 1S Shell 5 comprising walls 1 and bottom A Simi tained at a low point even after the refrigerant t w H arranged outside the .shen 6 so the bottoms 8 by the same means which cause the slow melting 5 and Il are preferably in contact, and the several rate of the refrigerant respective walls I and i0 are in spaced relation In the form of the invention shown in Figure to i a the 15 2, a mechanical or similar type of refrigerator fined an Sea e agamstf clrculatlon' is shown, the walls of which may be insulated spaced relation Wlth the shell}, there 15 as previously described. However, in this in- 50 pmvlded flask preferably round m plan stance the shells 6 and 9 form a vacuum flask tion, said flask including spaced walls l4 and ma similar t the flask l3.

l5 hav be ee e a vac 16- As shown in this form of the invention, the As shown, t e fl s 3 8 su oun ed by an refrigerant between the flask l3 and the shell insulating material such as cork, felt and the like 8, may be replaced by tubes or coils 23 connected '55 with the mechanism of the refrigerator. These tubes or coils may become frosted over in the normal course of operation and this frosting then serves, as heretofore described, as the refrigerated insulation.

If desired, as seen in Figure 3, another refrigerant chamber 2| may be placed within the vacuum flask I 2, the chamber 5 hence being provided with a wall 22.

As can be seen from the foregoing several forms of the invention, effective means have been provided for first reducing the melting rate of the refrigerant and then for reducing the temperature rise of the resultant water. While several embodiments have been shown, it is apparent that other similar constructions may be utilized for the same purpose, hence the scope of the invention as hereafter claimed should rather be based on the prior art than on the present specific disclosure.

I claim;

1. A refrigerator comprising an outer casing, a lining of insulation within the casing, a vacuum chamber within the lining, a double-walled metal container within the vacuum chamber and spaced therefrom, the double walls of the sides being spaced apart to form an insulating chamber therearound, and the double walls of the bottom of said container being in intimate surface contact, a storage chamber within the container, the vacuum chamber and the doublewalled container being arranged to form a space to receive a refrigerating medium which is presented in heat transfer relation to the storage 5 chamber.

2. A refrigerator comprising a metal shell having bottom and sides, a second metal shell outside the first shell with the bottoms of both shells in intimate surface contact but with their respective sides in spaced relation to provide a circumambient insulating chamber, an annulus joining and sealed to the top edges of said shells, a flask surrounding the outer shell and in spaced relation from all of the walls thereof, said flask itself being double-walled, the walls of which are spaced apart and said space being substantially evacuated, said flask being wholly surrounded by an insulating material confined within an outer casing, and a refrigerating medium in the space between the outer shell and the flask and in heat transfer relation to the outer shell.

3. A refrigerator comprisingan outer casing. a lining of. insulation within the casing, a vacuum chamber within the lining, a container within the vacuum chamber, the sides only of said container having spaced double walls to constitute another insulating chamber, and a storage chamber within the container, the vacuum chamber and the container being so arranged as to form a space between them to receive a refrigerating medium and to present said medium in heat transfer relation to said storage chamber.

4. A refrigerator comprising an outer casing, a lining of insulation within the casing, a vacuum chamber within the lining, a second vacuum chamber within the first-mentioned vacuum chamber, and a storage chamber within the sec- 0nd vacuum chamber, the two vacuum chambers being arranged to form a space to receive a refrigerating medium and to present said medium in heat transfer relation to the storage chamber.

JOSEPH M. ROSS. 

